The OTC website should display a field in the web of trust database that indicates if the enforce setting is enabled.
It would encourage good practice, improve the integrity of bitcoin OTC, and make the -10 spammers useless and unneeded.
It could, but how many people are vain enough to check their ratings page on a daily basis? Not Herodes, so in all this time the squatters didn't even have to try to nickserv ident, they could just use his nick, flat out. And then say "oh, I forgot how to auth to gribble, trade with ME, Herodes, anyway!" or some BS to that effect. It's worked countless times, otherwise, THIS THREAD WOULD NOT HAVE EVER BEEN CREATED.
Without someone ;;getrating the owner while they're online and them seeing a -1 as a trigger to look there...
Other things that are somewhat, if not completely ineffective:
;;later tell - gribble doesn't care who's on the nick, so the squatter reads the message and the owner isn't notified
Alert bots - still getting reports of scams/scam attempts even with them running, because people either don't read them, or they don't fire channel warnings on 100% of the squatters
/msg memoserv send nick - As previously mentioned, the 'emailmemos' flag in nickserv is almost never enabled by anyone*, which means you can send a memo and it goes to the email address registered with Freenode regardless of whether there is someone using the nick or not - if disabled, the memo is only delivered via IRC. *In fact, in the dozens if not hundreds of nicks I've info'd, I can only remember my own nick having this enabled.
E-mailing people - As previously mentioned, not everyone has 1) registered on the GPG side of gribble, and 2) put a valid email address in their GPG key